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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/proc/array.c
3 *
4 * Copyright (C) 1992 by Linus Torvalds
5 * based on ideas by Darren Senn
6 *
7 * Fixes:
8 * Michael. K. Johnson: stat,statm extensions.
9 * <johnsonm@stolaf.edu>
10 *
11 * Pauline Middelink : Made cmdline,envline only break at '\0's, to
12 * make sure SET_PROCTITLE works. Also removed
13 * bad '!' which forced address recalculation for
14 * EVERY character on the current page.
15 * <middelin@polyware.iaf.nl>
16 *
17 * Danny ter Haar : added cpuinfo
18 * <dth@cistron.nl>
19 *
20 * Alessandro Rubini : profile extension.
21 * <rubini@ipvvis.unipv.it>
22 *
23 * Jeff Tranter : added BogoMips field to cpuinfo
24 * <Jeff_Tranter@Mitel.COM>
25 *
26 * Bruno Haible : remove 4K limit for the maps file
27 * <haible@ma2s2.mathematik.uni-karlsruhe.de>
28 *
29 * Yves Arrouye : remove removal of trailing spaces in get_array.
30 * <Yves.Arrouye@marin.fdn.fr>
31 *
32 * Jerome Forissier : added per-CPU time information to /proc/stat
33 * and /proc/<pid>/cpu extension
34 * <forissier@isia.cma.fr>
35 * - Incorporation and non-SMP safe operation
36 * of forissier patch in 2.1.78 by
37 * Hans Marcus <crowbar@concepts.nl>
38 *
39 * aeb@cwi.nl : /proc/partitions
40 *
41 *
42 * Alan Cox : security fixes.
Alan Cox526719b2008-10-27 15:19:48 +000043 * <alan@lxorguk.ukuu.org.uk>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 *
45 * Al Viro : safe handling of mm_struct
46 *
47 * Gerhard Wichert : added BIGMEM support
48 * Siemens AG <Gerhard.Wichert@pdb.siemens.de>
49 *
50 * Al Viro & Jeff Garzik : moved most of the thing into base.c and
51 * : proc_misc.c. The rest may eventually go into
52 * : base.c too.
53 */
54
Linus Torvalds1da177e2005-04-16 15:20:36 -070055#include <linux/types.h>
56#include <linux/errno.h>
57#include <linux/time.h>
58#include <linux/kernel.h>
59#include <linux/kernel_stat.h>
60#include <linux/tty.h>
61#include <linux/string.h>
62#include <linux/mman.h>
63#include <linux/proc_fs.h>
64#include <linux/ioport.h>
Ingo Molnar8ea02602007-07-16 09:46:31 +020065#include <linux/uaccess.h>
66#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070067#include <linux/mm.h>
68#include <linux/hugetlb.h>
69#include <linux/pagemap.h>
70#include <linux/swap.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070071#include <linux/smp.h>
72#include <linux/signal.h>
73#include <linux/highmem.h>
74#include <linux/file.h>
Al Viro9f3acc32008-04-24 07:44:08 -040075#include <linux/fdtable.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070076#include <linux/times.h>
77#include <linux/cpuset.h>
Dipankar Sarma4fb3a532005-09-16 19:28:13 -070078#include <linux/rcupdate.h>
Shailabh Nagar25890452006-07-14 00:24:43 -070079#include <linux/delayacct.h>
Eric W. Biedermanee992742008-02-08 04:18:31 -080080#include <linux/seq_file.h>
Pavel Emelyanovb4888932007-10-18 23:40:14 -070081#include <linux/pid_namespace.h>
Jake Edgef83ce3e2009-05-04 12:51:14 -060082#include <linux/ptrace.h>
Roland McGrath0d094ef2008-07-25 19:45:49 -070083#include <linux/tracehook.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
Linus Torvalds1da177e2005-04-16 15:20:36 -070085#include <asm/pgtable.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070086#include <asm/processor.h>
87#include "internal.h"
88
Eric W. Biedermandf5f8312008-02-08 04:18:33 -080089static inline void task_name(struct seq_file *m, struct task_struct *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090{
91 int i;
Eric W. Biedermandf5f8312008-02-08 04:18:33 -080092 char *buf, *end;
Ingo Molnar8ea02602007-07-16 09:46:31 +020093 char *name;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 char tcomm[sizeof(p->comm)];
95
96 get_task_comm(tcomm, p);
97
Alexey Dobriyan9d6de122011-01-12 17:00:32 -080098 seq_puts(m, "Name:\t");
Eric W. Biedermandf5f8312008-02-08 04:18:33 -080099 end = m->buf + m->size;
100 buf = m->buf + m->count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 name = tcomm;
102 i = sizeof(tcomm);
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800103 while (i && (buf < end)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 unsigned char c = *name;
105 name++;
106 i--;
107 *buf = c;
108 if (!c)
109 break;
110 if (c == '\\') {
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800111 buf++;
112 if (buf < end)
113 *buf++ = c;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 continue;
115 }
116 if (c == '\n') {
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800117 *buf++ = '\\';
118 if (buf < end)
119 *buf++ = 'n';
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 continue;
121 }
122 buf++;
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800123 }
124 m->count = buf - m->buf;
Alexey Dobriyan9d6de122011-01-12 17:00:32 -0800125 seq_putc(m, '\n');
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126}
127
128/*
129 * The task state array is a strange "bitmap" of
130 * reasons to sleep. Thus "running" is zero, and
131 * you can test for combinations of others with
132 * simple bit tests.
133 */
Mike Frysingere130aa72011-05-26 16:25:51 -0700134static const char * const task_state_array[] = {
Peter Zijlstrae1781532009-12-17 13:16:30 +0100135 "R (running)", /* 0 */
136 "S (sleeping)", /* 1 */
137 "D (disk sleep)", /* 2 */
138 "T (stopped)", /* 4 */
139 "t (tracing stop)", /* 8 */
140 "Z (zombie)", /* 16 */
141 "X (dead)", /* 32 */
142 "x (dead)", /* 64 */
Peter Zijlstra464763c2009-12-17 13:16:29 +0100143 "K (wakekill)", /* 128 */
144 "W (waking)", /* 256 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145};
146
Ingo Molnar8ea02602007-07-16 09:46:31 +0200147static inline const char *get_task_state(struct task_struct *tsk)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148{
Matthew Wilcox1587e2b2007-12-06 11:03:36 -0500149 unsigned int state = (tsk->state & TASK_REPORT) | tsk->exit_state;
Mike Frysingere130aa72011-05-26 16:25:51 -0700150 const char * const *p = &task_state_array[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
Peter Zijlstrae1781532009-12-17 13:16:30 +0100152 BUILD_BUG_ON(1 + ilog2(TASK_STATE_MAX) != ARRAY_SIZE(task_state_array));
153
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 while (state) {
155 p++;
156 state >>= 1;
157 }
158 return *p;
159}
160
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800161static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
162 struct pid *pid, struct task_struct *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163{
164 struct group_info *group_info;
165 int g;
Dipankar Sarmabadf1662005-09-09 13:04:10 -0700166 struct fdtable *fdt = NULL;
David Howellsc69e8d92008-11-14 10:39:19 +1100167 const struct cred *cred;
Pavel Emelyanovb4888932007-10-18 23:40:14 -0700168 pid_t ppid, tpid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
Oleg Nesterovb0fa9db2006-10-02 02:18:54 -0700170 rcu_read_lock();
Pavel Emelyanovb4888932007-10-18 23:40:14 -0700171 ppid = pid_alive(p) ?
172 task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0;
Roland McGrath0d094ef2008-07-25 19:45:49 -0700173 tpid = 0;
174 if (pid_alive(p)) {
Tejun Heo06d98472011-06-17 16:50:40 +0200175 struct task_struct *tracer = ptrace_parent(p);
Roland McGrath0d094ef2008-07-25 19:45:49 -0700176 if (tracer)
177 tpid = task_pid_nr_ns(tracer, ns);
178 }
David Howellsde09a972010-07-29 12:45:49 +0100179 cred = get_task_cred(p);
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800180 seq_printf(m,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 "State:\t%s\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 "Tgid:\t%d\n"
183 "Pid:\t%d\n"
184 "PPid:\t%d\n"
185 "TracerPid:\t%d\n"
186 "Uid:\t%d\t%d\t%d\t%d\n"
187 "Gid:\t%d\t%d\t%d\t%d\n",
188 get_task_state(p),
Pavel Emelyanovb4888932007-10-18 23:40:14 -0700189 task_tgid_nr_ns(p, ns),
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800190 pid_nr_ns(pid, ns),
Pavel Emelyanovb4888932007-10-18 23:40:14 -0700191 ppid, tpid,
David Howellsc69e8d92008-11-14 10:39:19 +1100192 cred->uid, cred->euid, cred->suid, cred->fsuid,
193 cred->gid, cred->egid, cred->sgid, cred->fsgid);
Oleg Nesterovb0fa9db2006-10-02 02:18:54 -0700194
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 task_lock(p);
Dipankar Sarmabadf1662005-09-09 13:04:10 -0700196 if (p->files)
197 fdt = files_fdtable(p->files);
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800198 seq_printf(m,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 "FDSize:\t%d\n"
200 "Groups:\t",
Dipankar Sarmabadf1662005-09-09 13:04:10 -0700201 fdt ? fdt->max_fds : 0);
Dipankar Sarma4fb3a532005-09-16 19:28:13 -0700202 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
David Howellsc69e8d92008-11-14 10:39:19 +1100204 group_info = cred->group_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 task_unlock(p);
206
Ingo Molnar8ea02602007-07-16 09:46:31 +0200207 for (g = 0; g < min(group_info->ngroups, NGROUPS_SMALL); g++)
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800208 seq_printf(m, "%d ", GROUP_AT(group_info, g));
David Howellsc69e8d92008-11-14 10:39:19 +1100209 put_cred(cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
Alexey Dobriyan9d6de122011-01-12 17:00:32 -0800211 seq_putc(m, '\n');
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212}
213
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800214static void render_sigset_t(struct seq_file *m, const char *header,
215 sigset_t *set)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216{
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800217 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218
Alexey Dobriyan9d6de122011-01-12 17:00:32 -0800219 seq_puts(m, header);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220
221 i = _NSIG;
222 do {
223 int x = 0;
224
225 i -= 4;
226 if (sigismember(set, i+1)) x |= 1;
227 if (sigismember(set, i+2)) x |= 2;
228 if (sigismember(set, i+3)) x |= 4;
229 if (sigismember(set, i+4)) x |= 8;
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800230 seq_printf(m, "%x", x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 } while (i >= 4);
232
Alexey Dobriyan9d6de122011-01-12 17:00:32 -0800233 seq_putc(m, '\n');
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234}
235
236static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
237 sigset_t *catch)
238{
239 struct k_sigaction *k;
240 int i;
241
242 k = p->sighand->action;
243 for (i = 1; i <= _NSIG; ++i, ++k) {
244 if (k->sa.sa_handler == SIG_IGN)
245 sigaddset(ign, i);
246 else if (k->sa.sa_handler != SIG_DFL)
247 sigaddset(catch, i);
248 }
249}
250
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800251static inline void task_sig(struct seq_file *m, struct task_struct *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252{
Oleg Nesterov5e6b3f42006-10-02 02:18:52 -0700253 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 sigset_t pending, shpending, blocked, ignored, caught;
255 int num_threads = 0;
256 unsigned long qsize = 0;
257 unsigned long qlim = 0;
258
259 sigemptyset(&pending);
260 sigemptyset(&shpending);
261 sigemptyset(&blocked);
262 sigemptyset(&ignored);
263 sigemptyset(&caught);
264
Oleg Nesterov5e6b3f42006-10-02 02:18:52 -0700265 if (lock_task_sighand(p, &flags)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 pending = p->pending.signal;
267 shpending = p->signal->shared_pending.signal;
268 blocked = p->blocked;
269 collect_sigign_sigcatch(p, &ignored, &caught);
Oleg Nesterov7e498272010-05-26 14:43:22 -0700270 num_threads = get_nr_threads(p);
Paul E. McKenney7dc52152010-02-22 17:04:52 -0800271 rcu_read_lock(); /* FIXME: is this correct? */
David Howellsc69e8d92008-11-14 10:39:19 +1100272 qsize = atomic_read(&__task_cred(p)->user->sigpending);
Paul E. McKenney7dc52152010-02-22 17:04:52 -0800273 rcu_read_unlock();
Jiri Slabyd554ed892010-03-05 13:42:42 -0800274 qlim = task_rlimit(p, RLIMIT_SIGPENDING);
Oleg Nesterov5e6b3f42006-10-02 02:18:52 -0700275 unlock_task_sighand(p, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800278 seq_printf(m, "Threads:\t%d\n", num_threads);
279 seq_printf(m, "SigQ:\t%lu/%lu\n", qsize, qlim);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
281 /* render them all */
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800282 render_sigset_t(m, "SigPnd:\t", &pending);
283 render_sigset_t(m, "ShdPnd:\t", &shpending);
284 render_sigset_t(m, "SigBlk:\t", &blocked);
285 render_sigset_t(m, "SigIgn:\t", &ignored);
286 render_sigset_t(m, "SigCgt:\t", &caught);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287}
288
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800289static void render_cap_t(struct seq_file *m, const char *header,
290 kernel_cap_t *a)
Andrew Morgane338d262008-02-04 22:29:42 -0800291{
292 unsigned __capi;
293
Alexey Dobriyan9d6de122011-01-12 17:00:32 -0800294 seq_puts(m, header);
Andrew Morgane338d262008-02-04 22:29:42 -0800295 CAP_FOR_EACH_U32(__capi) {
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800296 seq_printf(m, "%08x",
Andrew G. Morganca05a992008-05-27 22:05:17 -0700297 a->cap[(_KERNEL_CAPABILITY_U32S-1) - __capi]);
Andrew Morgane338d262008-02-04 22:29:42 -0800298 }
Alexey Dobriyan9d6de122011-01-12 17:00:32 -0800299 seq_putc(m, '\n');
Andrew Morgane338d262008-02-04 22:29:42 -0800300}
301
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800302static inline void task_cap(struct seq_file *m, struct task_struct *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303{
David Howellsc69e8d92008-11-14 10:39:19 +1100304 const struct cred *cred;
305 kernel_cap_t cap_inheritable, cap_permitted, cap_effective, cap_bset;
David Howellsb6dff3e2008-11-14 10:39:16 +1100306
David Howellsc69e8d92008-11-14 10:39:19 +1100307 rcu_read_lock();
308 cred = __task_cred(p);
309 cap_inheritable = cred->cap_inheritable;
310 cap_permitted = cred->cap_permitted;
311 cap_effective = cred->cap_effective;
312 cap_bset = cred->cap_bset;
313 rcu_read_unlock();
314
315 render_cap_t(m, "CapInh:\t", &cap_inheritable);
316 render_cap_t(m, "CapPrm:\t", &cap_permitted);
317 render_cap_t(m, "CapEff:\t", &cap_effective);
318 render_cap_t(m, "CapBnd:\t", &cap_bset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319}
320
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800321static inline void task_context_switch_counts(struct seq_file *m,
322 struct task_struct *p)
Maxim Uvarovb663a792007-07-15 23:40:48 -0700323{
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800324 seq_printf(m, "voluntary_ctxt_switches:\t%lu\n"
325 "nonvoluntary_ctxt_switches:\t%lu\n",
326 p->nvcsw,
327 p->nivcsw);
Maxim Uvarovb663a792007-07-15 23:40:48 -0700328}
329
Heiko Carstensd01d4822009-09-21 11:06:27 +0200330static void task_cpus_allowed(struct seq_file *m, struct task_struct *task)
331{
Alexey Dobriyan9d6de122011-01-12 17:00:32 -0800332 seq_puts(m, "Cpus_allowed:\t");
Heiko Carstensd01d4822009-09-21 11:06:27 +0200333 seq_cpumask(m, &task->cpus_allowed);
Alexey Dobriyan9d6de122011-01-12 17:00:32 -0800334 seq_putc(m, '\n');
335 seq_puts(m, "Cpus_allowed_list:\t");
Heiko Carstensd01d4822009-09-21 11:06:27 +0200336 seq_cpumask_list(m, &task->cpus_allowed);
Alexey Dobriyan9d6de122011-01-12 17:00:32 -0800337 seq_putc(m, '\n');
Heiko Carstensd01d4822009-09-21 11:06:27 +0200338}
339
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800340int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
341 struct pid *pid, struct task_struct *task)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 struct mm_struct *mm = get_task_mm(task);
344
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800345 task_name(m, task);
346 task_state(m, ns, pid, task);
Ingo Molnar8ea02602007-07-16 09:46:31 +0200347
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 if (mm) {
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800349 task_mem(m, mm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 mmput(mm);
351 }
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800352 task_sig(m, task);
353 task_cap(m, task);
Heiko Carstensd01d4822009-09-21 11:06:27 +0200354 task_cpus_allowed(m, task);
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800355 cpuset_task_status_allowed(m, task);
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800356 task_context_switch_counts(m, task);
357 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358}
359
Eric W. Biedermanee992742008-02-08 04:18:31 -0800360static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
361 struct pid *pid, struct task_struct *task, int whole)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362{
363 unsigned long vsize, eip, esp, wchan = ~0UL;
364 long priority, nice;
365 int tty_pgrp = -1, tty_nr = 0;
366 sigset_t sigign, sigcatch;
367 char state;
Ingo Molnar8ea02602007-07-16 09:46:31 +0200368 pid_t ppid = 0, pgid = -1, sid = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 int num_threads = 0;
Jake Edgef83ce3e2009-05-04 12:51:14 -0600370 int permitted;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 struct mm_struct *mm;
372 unsigned long long start_time;
373 unsigned long cmin_flt = 0, cmaj_flt = 0;
374 unsigned long min_flt = 0, maj_flt = 0;
Christian Borntraegerefe567f2007-08-23 15:18:02 +0200375 cputime_t cutime, cstime, utime, stime;
Laurent Vivier9ac52312007-10-15 17:00:19 +0200376 cputime_t cgtime, gtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 unsigned long rsslim = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 char tcomm[sizeof(task->comm)];
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700379 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
381 state = *get_task_state(task);
382 vsize = eip = esp = 0;
Eric Paris69f594a2012-01-03 12:25:15 -0500383 permitted = ptrace_may_access(task, PTRACE_MODE_READ | PTRACE_MODE_NOAUDIT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 mm = get_task_mm(task);
385 if (mm) {
386 vsize = task_vsize(mm);
Jake Edgef83ce3e2009-05-04 12:51:14 -0600387 if (permitted) {
388 eip = KSTK_EIP(task);
389 esp = KSTK_ESP(task);
390 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 }
392
393 get_task_comm(tcomm, task);
394
395 sigemptyset(&sigign);
396 sigemptyset(&sigcatch);
Martin Schwidefsky64861632011-12-15 14:56:09 +0100397 cutime = cstime = utime = stime = 0;
398 cgtime = gtime = 0;
Alan Cox3cfd0882006-09-29 02:00:41 -0700399
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700400 if (lock_task_sighand(task, &flags)) {
401 struct signal_struct *sig = task->signal;
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700402
Oleg Nesterov91593502006-12-08 02:36:07 -0800403 if (sig->tty) {
Alan Cox5d0fdf12008-04-30 00:53:31 -0700404 struct pid *pgrp = tty_get_pgrp(sig->tty);
405 tty_pgrp = pid_nr_ns(pgrp, ns);
406 put_pid(pgrp);
Oleg Nesterov91593502006-12-08 02:36:07 -0800407 tty_nr = new_encode_dev(tty_devnum(sig->tty));
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700408 }
409
Oleg Nesterov7e498272010-05-26 14:43:22 -0700410 num_threads = get_nr_threads(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 collect_sigign_sigcatch(task, &sigign, &sigcatch);
412
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700413 cmin_flt = sig->cmin_flt;
414 cmaj_flt = sig->cmaj_flt;
415 cutime = sig->cutime;
416 cstime = sig->cstime;
Laurent Vivier9ac52312007-10-15 17:00:19 +0200417 cgtime = sig->cgtime;
Jiri Slabyd554ed892010-03-05 13:42:42 -0800418 rsslim = ACCESS_ONCE(sig->rlim[RLIMIT_RSS].rlim_cur);
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700419
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 /* add up live thread stats at the group level */
421 if (whole) {
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700422 struct task_struct *t = task;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 do {
424 min_flt += t->min_flt;
425 maj_flt += t->maj_flt;
Martin Schwidefsky64861632011-12-15 14:56:09 +0100426 gtime += t->gtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 t = next_thread(t);
428 } while (t != task);
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700429
430 min_flt += sig->min_flt;
431 maj_flt += sig->maj_flt;
Hidetoshi Seto0cf55e12009-12-02 17:28:07 +0900432 thread_group_times(task, &utime, &stime);
Martin Schwidefsky64861632011-12-15 14:56:09 +0100433 gtime += sig->gtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 }
435
Pavel Emelyanovb4888932007-10-18 23:40:14 -0700436 sid = task_session_nr_ns(task, ns);
Oleg Nesterova98fdce2008-01-15 00:02:37 +0300437 ppid = task_tgid_nr_ns(task->real_parent, ns);
Pavel Emelyanovb4888932007-10-18 23:40:14 -0700438 pgid = task_pgrp_nr_ns(task, ns);
Oleg Nesterova593d6e2006-10-02 02:18:53 -0700439
440 unlock_task_sighand(task, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442
Jake Edgef83ce3e2009-05-04 12:51:14 -0600443 if (permitted && (!whole || num_threads < 2))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 wchan = get_wchan(task);
445 if (!whole) {
446 min_flt = task->min_flt;
447 maj_flt = task->maj_flt;
Hidetoshi Setod180c5b2009-11-26 14:48:30 +0900448 task_times(task, &utime, &stime);
Hidetoshi Setod5b7c782009-11-26 14:49:05 +0900449 gtime = task->gtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 }
451
452 /* scale priority and nice values from timeslices to -20..20 */
453 /* to make it look like a "normal" Unix priority/nice value */
454 priority = task_prio(task);
455 nice = task_nice(task);
456
457 /* Temporary variable needed for gcc-2.96 */
458 /* convert timespec -> nsec*/
Tomas Janousek924b42d2007-07-15 23:39:42 -0700459 start_time =
460 (unsigned long long)task->real_start_time.tv_sec * NSEC_PER_SEC
461 + task->real_start_time.tv_nsec;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 /* convert nsec -> ticks */
463 start_time = nsec_to_clock_t(start_time);
464
KAMEZAWA Hiroyukibda7bad2012-03-23 15:02:54 -0700465 seq_printf(m, "%d (%s) %c", pid_nr_ns(pid, ns), tcomm, state);
466 seq_put_decimal_ll(m, ' ', ppid);
467 seq_put_decimal_ll(m, ' ', pgid);
468 seq_put_decimal_ll(m, ' ', sid);
469 seq_put_decimal_ll(m, ' ', tty_nr);
470 seq_put_decimal_ll(m, ' ', tty_pgrp);
471 seq_put_decimal_ull(m, ' ', task->flags);
472 seq_put_decimal_ull(m, ' ', min_flt);
473 seq_put_decimal_ull(m, ' ', cmin_flt);
474 seq_put_decimal_ull(m, ' ', maj_flt);
475 seq_put_decimal_ull(m, ' ', cmaj_flt);
476 seq_put_decimal_ull(m, ' ', cputime_to_clock_t(utime));
477 seq_put_decimal_ull(m, ' ', cputime_to_clock_t(stime));
478 seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cutime));
479 seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cstime));
480 seq_put_decimal_ll(m, ' ', priority);
481 seq_put_decimal_ll(m, ' ', nice);
482 seq_put_decimal_ll(m, ' ', num_threads);
483 seq_put_decimal_ull(m, ' ', 0);
484 seq_put_decimal_ull(m, ' ', start_time);
485 seq_put_decimal_ull(m, ' ', vsize);
486 seq_put_decimal_ll(m, ' ', mm ? get_mm_rss(mm) : 0);
487 seq_put_decimal_ull(m, ' ', rsslim);
488 seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->start_code : 1) : 0);
489 seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->end_code : 1) : 0);
490 seq_put_decimal_ull(m, ' ', (permitted && mm) ? mm->start_stack : 0);
491 seq_put_decimal_ull(m, ' ', esp);
492 seq_put_decimal_ull(m, ' ', eip);
493 /* The signal information here is obsolete.
494 * It must be decimal for Linux 2.0 compatibility.
495 * Use /proc/#/status for real-time signals.
496 */
497 seq_put_decimal_ull(m, ' ', task->pending.signal.sig[0] & 0x7fffffffUL);
498 seq_put_decimal_ull(m, ' ', task->blocked.sig[0] & 0x7fffffffUL);
499 seq_put_decimal_ull(m, ' ', sigign.sig[0] & 0x7fffffffUL);
500 seq_put_decimal_ull(m, ' ', sigcatch.sig[0] & 0x7fffffffUL);
501 seq_put_decimal_ull(m, ' ', wchan);
502 seq_put_decimal_ull(m, ' ', 0);
503 seq_put_decimal_ull(m, ' ', 0);
504 seq_put_decimal_ll(m, ' ', task->exit_signal);
505 seq_put_decimal_ll(m, ' ', task_cpu(task));
506 seq_put_decimal_ull(m, ' ', task->rt_priority);
507 seq_put_decimal_ull(m, ' ', task->policy);
508 seq_put_decimal_ull(m, ' ', delayacct_blkio_ticks(task));
509 seq_put_decimal_ull(m, ' ', cputime_to_clock_t(gtime));
510 seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cgtime));
511 seq_put_decimal_ull(m, ' ', (mm && permitted) ? mm->start_data : 0);
512 seq_put_decimal_ull(m, ' ', (mm && permitted) ? mm->end_data : 0);
513 seq_put_decimal_ull(m, ' ', (mm && permitted) ? mm->start_brk : 0);
514 seq_putc(m, '\n');
Ingo Molnar8ea02602007-07-16 09:46:31 +0200515 if (mm)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 mmput(mm);
Eric W. Biedermanee992742008-02-08 04:18:31 -0800517 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518}
519
Eric W. Biedermanee992742008-02-08 04:18:31 -0800520int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
521 struct pid *pid, struct task_struct *task)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522{
Eric W. Biedermanee992742008-02-08 04:18:31 -0800523 return do_task_stat(m, ns, pid, task, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524}
525
Eric W. Biedermanee992742008-02-08 04:18:31 -0800526int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
527 struct pid *pid, struct task_struct *task)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528{
Eric W. Biedermanee992742008-02-08 04:18:31 -0800529 return do_task_stat(m, ns, pid, task, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530}
531
Eric W. Biedermana56d3fc2008-02-08 04:18:32 -0800532int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
533 struct pid *pid, struct task_struct *task)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534{
Alexey Dobriyana2ade7b2011-01-12 17:00:32 -0800535 unsigned long size = 0, resident = 0, shared = 0, text = 0, data = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 struct mm_struct *mm = get_task_mm(task);
Ingo Molnar8ea02602007-07-16 09:46:31 +0200537
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 if (mm) {
539 size = task_statm(mm, &shared, &text, &data, &resident);
540 mmput(mm);
541 }
KAMEZAWA Hiroyukibda7bad2012-03-23 15:02:54 -0700542 /*
543 * For quick read, open code by putting numbers directly
544 * expected format is
545 * seq_printf(m, "%lu %lu %lu %lu 0 %lu 0\n",
546 * size, resident, shared, text, data);
547 */
548 seq_put_decimal_ull(m, 0, size);
549 seq_put_decimal_ull(m, ' ', resident);
550 seq_put_decimal_ull(m, ' ', shared);
551 seq_put_decimal_ull(m, ' ', text);
552 seq_put_decimal_ull(m, ' ', 0);
KAMEZAWA Hiroyuki3748b2f2012-03-28 14:42:39 -0700553 seq_put_decimal_ull(m, ' ', data);
KAMEZAWA Hiroyukibda7bad2012-03-23 15:02:54 -0700554 seq_put_decimal_ull(m, ' ', 0);
555 seq_putc(m, '\n');
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556
Eric W. Biedermana56d3fc2008-02-08 04:18:32 -0800557 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558}